Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8a2937231ffe135…

MALICIOUS

PDF

74.9 KB Created: 2021-03-21 09:41:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 48e25c728d916b3bc1953a7bda8f5205 SHA-1: 94cec22cb6c40fd240b7edcf993b07521e6be958 SHA-256: e8a2937231ffe1350f43e7c4a7cdaf8597573347a9f2094e700b4907b0ea7b80
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting it is part of an SEO spam or phishing campaign. The primary malicious URL identified is https://gimoguvi.ru/strik?utm_term=cara+head+cleaning+printer+hp+officejet+7110.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gimoguvi.ru/strik?utm_term=cara+head+cleaning+printer+hp+officejet+7110 PDF link annotation
    • https://cdn.sqhk.co/mekerijiwuv/cieecij/vr_lenses_fogging_up.pdfIn PDF document text
    • https://cdn.sqhk.co/kuderoxuz/dS1hdgw/zexixorivarofadegul.pdfIn PDF document text
    • https://cdn.sqhk.co/neseleko/fP7jnJT/gazuxaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458622/normal_604152b6bed72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408462/normal_5ffed43ee789a.pdfIn PDF document text
    • https://cdn.sqhk.co/weruvewo/jfbhe50/talking_tom_cat_2010_gilly_berlin.pdfIn PDF document text
    • http://bezerojiw.scienceontheweb.net/abinitio_interview_questions_and_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1f49b3f1-4b09-4f89-88df-03804352fc9a.filesusr.com/ugd/a51aec_c34ceb7fa06f4fdfaed7e92017c7cebd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca547e0d-bcfb-41da-ae09-bcdc1396b294/96394034100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70656499-8543-473c-bd1e-dcdc7ee3e38d/17438499928.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d587bf3-047a-46d0-82ad-ffaa39a70f3a/hp_photosmart_plus_b210a_printhead_missing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70e5c7e1-2898-44d2-9b3a-1778ee5dbd24/play_opera_madama_butterfly_2016.pdfIn PDF document text
    • http://solarujarinobo.myartsonline.com/capacity_management_blackstone.pdfIn PDF document text
    • https://70fbc5f3-53e4-4072-9ff7-a5862d19847b.filesusr.com/ugd/bb3bf9_cbd90555a7d34cca8be4652b92cf732e.pdf?index=trueIn PDF document text
    • https://828c6a01-da61-4814-986a-f72e64f4f334.filesusr.com/ugd/cdfdba_614474196b32407aa606a9c31399990e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b19eaafd-aff5-4099-a509-6fc476fdc32c/is_masterclass_really_worth_it.pdfIn PDF document text
    • http://xogijowag.onlinewebshop.net/74630504951.pdfIn PDF document text
    • https://9370005b-87d8-49d8-b27c-18dce193a2f1.filesusr.com/ugd/52ea04_91a48f6711054060af0a34994535eed3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2f0bfbf-2698-45e2-80ff-81f335994c05/how_much_does_army_national_guard_reserve_pay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6968d0e2-dc38-4e52-af36-948b8035e204/como_ganar_amigos_e_influir_sobre_las_personas_descargar_gratis.pdfIn PDF document text
    • https://6448a590-b571-4b71-a9e4-820b8531b153.filesusr.com/ugd/782be2_2d4d8fc34cd1448fb2a87ecf8fffc680.pdf?index=trueIn PDF document text
    • http://vakifavu.onlinewebshop.net/xewirititutufug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2410ed0c-042e-4bd1-bd3f-fade8fdddff1/mobigasunavuwezutojanezi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e78e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78E 5496 bytes
SHA-256: 61dfe53e73d5c74522683fc09a97e9da8ee95609f996be27deb7a3201edad1db
font_01_sfnt_off0000fa4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4E 10444 bytes
SHA-256: 2ac533ae3e4594e3ba68d8af9db5f322c38f8b85b560687bbfed712588cfbb75